Auxiliary heating apparatus



July 13 1939. L. J. HIGGINS Er AL AUXILIARY HEATING APPARATUS Filed Nov. 17, 1937 @Peer-it 1"?"18' 1939 g 2,166,3556

alumnus p Auxlumtr mismo Armas'rus' Leo J. Higgins and Herman L. Rosen, v.

Madison, Wis. Y

p VJ-UNITED/fsfTATEs PATENT OFFICE Application November 17, 1937, -Bel'illl No, 114,954 v 3 Clllml. (Cl. 126-364)V This invention relates to a heating attachment dissipated,A will reach that portion of the flue for household or other water supplies, having for which has been deflected from the uptake porits purpose to utilize waste heat andpartially or tion.

wholly warm the water of such supply. Finally.. the device contemplates the use of a l The invention has for its object to provide a damper or other suitable valve located at the 5 system utilizing waste heat for the purpose stated, communication between the dead end heat trans- `which will operate with efficiency without defer chamber and the flue, and this damper is artracting from the efficient operation of the boiler ranged to be regulated in position for the pure or furnace to which it is applied, and which will poses, first, of regulating the volume of hot prodof -itseu be of simp1c and durable construction ucts of combustion that nse into the heat trans- 10 and rendered applicable to the existing boiler or fer chamber, and secondly, to direct the intake furnace with a minimum oi disarrangement of and discharge oi' these hot products in a manthe 11mmt ner to favor their circulation through the said Heretofore, numerous adjunctive devices have chamber. Thus, if a damper be mounted at the l5 been made and used for the transfer of a portion lower end of the heat transfer chamber, with l of the heat of a boiler or furnace to water stored movement upon a horizontal axis transverse to for household and other lSome of these the axis of the flue, and this damper be ad devices involved the use offbeat-absorbing coils JuSted with its lower margin forward in the direclai-,ed within the grepot or cgm-bugtion chamtion of flow through the flue, a relatively wide ber of the heating plant, but such arrangements opening will be Presented on the intake side of 2 are not economical in that they exercise a disadthe damper immediately over the uptake portion vantageous influence over the combustion relied `of the 11de. While the Said lower forwardly Dreupon for the main purpose of the plant. Other sented margin of the damper will provide a dearrangements have been located in the vent nue Y fleeting surface `directing return products toward where the heat transfer surfaces are impinged the chimney and thus promote their evacuation 25 against bythe stream ofproducts of combustion from the heat transfer chamber through the with the disadvantage ofimposing some obstrucelecting 0r Suction effect of the main now of tion upon the iiow of the latter 'as well as caus- Products in the lateral portion of the duct. ing precipitation of matters borne in suspension Referring now t0 the accompanying drawing therein. l Showing two embodiments of the invention by way 3 The present I invention proceeds upon the of illustrationprinciple of associating with a vent flue which ex- Figure 1 iS a front elevation Showing afurnace tends from the combustion chamber to the domestic water Storace tank,wh1ch may be prochimney or stack, a heat transfer chamber revided With its Own normal 88S heater; also a lated to such nue as a dead end offset com, chimney and auxiliary heater associated with the 35 municating with the flue without offering any ob- Smoke duet leading from the furnace to the struction to the latter and in a position to freely Chimney. t admit the products of combustion under their own Figure 2 i8 a front elevation showing a portion levity into the presence of heat absorbing surfaces, of the Smokeduot together with the heat ex-V from which, after giving up a portion of their ehanse chamber, auxiliary heater and its damper 4 heat, the cooled products settle by gravity back Control.

into the flue, where they pass of! to the chimney. l Figure 3 iS a eroSS Section at right angles to In the preferred arrangement, the flue is conand Showing Portions of Figure 2. .structed with a portion of its length directed up- Figure 4 iS a diagrammatic View Showing the ward and a portion extending from said upwardly auxiliary heater associated with an inclined 45 directed portion laterally, for instance, after the smoke duct between the furnace and the chimney; manner of an elbow commonly used in such flues; and `and 'the dead end heat transfer chamber com- Figure 5 iS a detail View Showing a modified municateswith the flue at the point of deflection form of heat exchanger in the auxiliary heater.

between these two -portions so that hot products A represents the conventional type of furnace 50 of combustion can rise into thel heat transfer or boiler, B a stack `or chimney, and C, C', C2

chamber bya movement which isa continuation several sections of a flue' delivering products of 4 of its upwardiiight in the flue, and preferably combustion from the furnace to the chimney.

t also the return from the heat transfer chamber of D represents a heat transfer chamber having products of combustion, with the heat partially aclosed end D' that makes itadead end chamber, 56

communicating with the ilue at the point X and preferably that portion C thereof which is directed upwardly and from which hot products of combustion may flow into the chamber D Without changing their direction, so as to promote the entry oi' hot products in the said chamber. Chamber D contains a heat absorbing water coil E connected in the conventional manner through intake pipe E and return pipe E2 of any suitable source of hot water storage. Chamber D also contains a damper F' mounted upon a supporting and controlling shaft F' that is transverse to the axes of the ilue and heat transfer chamber.

discharge G that promotes delivery of the partially spent hot gases in the direction of ow toward the chimney B.

As shown in Figure 4, the auxiliary heater may be incorporated with an inclined smoke duct CJ: in such position that the products of combustion can rise vertically gases that rise into the heat exchange chamber, the damper divides the inow from the outow in a manner to develop a partial by-pass efi'ect This circulation or further promoted nue current to the smoothness ot ilow is still by the ejector relation of the cooled gas discharge.

We claim:

1. In auxiliary heating and furnaces,

apparatus for boilers the combination of a combustion chamber discharge duct having an unobstructed flow capacity from the combustion chamber to a chimney or flue, said discharge duct being directed for a portion of its length upwardly and deilected thence laterally, a dead end heat exchange chamber opening laterally into said duct ble of utilizing the heat so absorbed.

2. In auxiliary heating apparatus for boilers Wardly presented combustion.

LEO J. HIGGINS. HERMAN L. ROSEN. 

